Help! Pipes and equipment might freeze

I am finally closing my pool after giving up on a safety cover and buying a tarp. My pool builder was supposed to close it today so I drained the water down. Well, he no showed and isn't responding. I suppose I should have expected this given my past experience with them.

It is supposed to get down to 19f tonight. I dont have anything to plug the lines with. What should I do to protect it tonight? Thank you for your help.